Sodium Dithionite → HCID 12389021, compound

Participants

Reaction Steps

Sodium dithionite (140 g, 0.804 mole) was added to a suspension of 3-nitro-7-methoxy-4H-1-benzopyran-4-one (50 g, 0.261 mole) in water (330 ml) and absolute ethanol (110 ml). The reaction mixture was stirred for 15 min., concentrated at reduced pressure and filtered. The solids were washed with water and recrystallized from ethyl acetate to give light brown crystals, 159°-162°.

Provenance & Evidence